A geologist is comparing the properties of different minerals. He rubs each one on a piece of white tile and observes the color of he power that is left behind. What type of test did he perform?

color

hardness

luster

streak

Temperature, salinity and density are factors that form a. deep currents C. surface currents b. wind currents d. deflection currents

A typical, neutrally charged atom has a. just as many electrons as protons. b. no neutrons in the nucleus. c. more protons than electrons. d. as many electrons as protons and neutrons combined. e. at least 1 neutron.

What is the average of this dаta: 2cm, 3.5cm, 6.1cm, 1.4 cm? and how do you get that answer?

Match the following vocabulary terms to their definitions. 1. density a proposed explanation for a scientific problem 2. matter standard metric unit of mass 3. control standard metric unit of length 4.

Which of the following items does not use a wheel and axle? A. a doorknob B. a light bulb C. a faucet handle D. a clock with hands

If you could see the electric field coming off a proton you would notice that electric field lines are

We wrap a light, nonstretching cable around a 10.0 kg kg solid cylinder with diameter of 38.0 cm cm. The cylinder rotates with negligible friction about a stationary horizontal axis. We tie the free end of the cable to a 14.

A 0.5kg baseball experiences a 10N force for a duration of 0.1s. What is the change in velocity of the baseball

A beam of light passes from air into a cube of zirconium if the angle of incidence is 40"what is the angle of refraction?

Which element combines chemically with sodium to form ordinary table salt? A) aluminum B) argon C) carbon D) chlorine